Javascript is strange: ('b'+'a'+ +'a'+'a').toLowerCase() == 'banana'

('b'+'a'+ +'a'+'a').toLowerCase() == 'banana'

('b'+'a'+ +'a'+'a').toLowerCase()
'banana'

Why?

+ + 'a' is + (+ 'a') which becomes NaN

So

('b'+'a'+ +'a'+'a')
is
'baNaNa'

And then converted to Lowercase:

'banana'

The Weird Thing about Javascript – Part I

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